Maybe a silly question - but is it unwise to use Firefox for getting torrents, or saving any bookmarks in firefox? Is there benefit to using a private window (doubtful as I believe this only affects your device).
I know we generally can trust Firefox but they could turn quickly.
I store my torrent links and bookmarks in Standard Notes. It is fully encrypted and replicates your data via Dropbox (db is encrypted so not readable to Dropbox). On my phone I can share a link from Firefox directly to Standard Notes.